As the group nears the end of their arduous pilgrimage, they encounter a formidable natural barrier: a river with a "strong current" where "waves crashed into jagged rocks." This river serves as the final physical challenge before reaching the Spirit Mountain. The companions react with varying degrees of despair; Bajie, ever the skeptic, suggests they "just go home," while Wu Jing acknowledges the danger but maintains that "we must cross it to get to the Spirit Mountains."
Wukong identifies the only apparent path: a "thin log" that "wobbled and shook" under the force of the water. This moment acts as a profound test of faith for the Tang Monk. While Wukong insists that the monk "must believe that it's safe" and demonstrates his own ease by running across it, the Tang Monk is paralyzed by his mortal fears, trembling and exclaiming, "I'll fall into the river and drown." Wukong’s refusal to carry his master is rooted in a deeper spiritual truth: "The Tang monk must make the entire journey by himself... Buddha won't allow Master to have the true scriptures if he doesn't take every step himself." This emphasizes that enlightenment cannot be inherited or carried; it must be earned through personal struggle and the shedding of worldly reliance.
A mysterious old man appears, offering passage in a boat that has "no bottom," with "water flowing right through it." This surreal imagery serves as a metaphor for the transition from the material world to the spiritual realm. The Tang Monk’s initial hesitation is overcome by the boatman’s assurance that "Buddha is waiting." Upon boarding, the monk is "shocked to find that he didn't sink," signaling his transition from a state of mortal attachment to one of spiritual buoyancy.
The climax of the journey occurs when the Tang Monk sees a body floating downstream. Upon realizing the corpse is wearing his own "Buddhist robe," he experiences a moment of existential shock. Wukong provides the ultimate clarification, explaining, "You got rid of your mortal body, master... You're a spirit now." This revelation marks the successful completion of the monk's transformation. By leaving his "mortal body" behind, he has finally transcended the limitations of the physical world.
As the group reaches the other side, the Tang Monk’s physical transformation is immediately apparent. He remarks, "I feel so light," and feels as though he "could run right up this mountain." The heavy burden of his mortal flesh has been replaced by the freedom of spirit. Even the playful interaction between Bajie and the Monk—where Bajie jokingly asks, "Perhaps you could carry me?"—highlights the joy and harmony of their completed mission. Having overcome the river and their own doubts, the travelers are now ready to ascend the Spirit Mountain, no longer hindered by the weight of their former selves.